The type support for C++ has been heavily refactored before the beta 1. So that might be related. On the other hand it passes all unit tests and works for me (and others) just fine. The to locations where the exception is thrown are: https://github.com/ros2/rmw_fastrtps/blob/release-beta1/rmw_fastrtps_cpp/src/functions.cpp#L782 and https://github.com/ros2/rmw_connext/blob/release-beta1/rmw_connext_cpp/src/functions.cpp#L225 In order to figure out what is wrong can you please debug a few local variables in `gdb`: * `print type_supports` * `print type_supports.typesupport_identifier` * `print type_supports.data` * `print type_supports.func` I haven't tried the following line but something like this: * `print (type_support_map_t *)(type_supports.data)` * `print ((type_support_map_t *)(type_supports.data)).size` * `print ((type_support_map_t *)(type_supports.data)).package_name` * `print ((type_support_map_t *)(type_supports.data)).typesupport_identifier[0]` --- [Visit Topic](https://discourse.ros.org/t/talker-example-issue-with-beta-1/992/11) or reply to this email to respond. If you do not want to receive messages from ros-users please use the unsubscribe link below. If you use the one above, you will stop all of ros-users from receiving updates. ______________________________________________________________________________ ros-users mailing list ros-users@lists.ros.org http://lists.ros.org/mailman/listinfo/ros-users Unsubscribe: